One of the best ways to save a species is, ironically, to eat it. Heritage turkeys are a prime example. Or take the bison: By the late 1800s, only about 1,000 of them remained. Now, thanks in part to a rise in bison consumption, their population has reached 450,000.

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One of the best ways to save a species is, ironically, to eat it. Heritage turkeys are a prime example. Or take the bison: By the late 1800s, only about 1,000 of them remained. Now, thanks in part to a rise in bison consumption, their population has reached 450,000.